We have a 13 year old German shapard/Austraalian shepard mix and very recently (the last month) we have noticed a change in her defecation behavior. Previous she used to go on grass or the side of the road/sidewalk; but recently she will go in the middle of the sidewalk/road (like a horse). The vet said this is normal for a dog her age but it can be embarrassing because she has always had a delicate digestive system. Everything else is good for her age. She is arthritic (we give her ketoprofen). Any ideas?

